Surface structures of a Co-doped anatase TiO2 (001) film investigated by scanning tunneling microscopy

被引：12

作者：

Yang, JS ^{[1
]}

Kim, DH

Bu, SD

Noh, TW

Phark, SH

Khim, ZG

Lyo, IW

Oh, SJ

机构：

[1] Seoul Natl Univ, ReCOE, Seoul 151747, South Korea

[2] Seoul Natl Univ, Sch Phys, Seoul 151747, South Korea

[3] Yonsei Univ, Atom Scale Surface Sci Res Ctr, Seoul 120742, South Korea

[4] Yonsei Univ, Dept Phys, Seoul 120742, South Korea

[5] Seoul Natl Univ, CSCMR, Seoul 151747, South Korea

来源：

APPLIED PHYSICS LETTERS | 2003年 / 82卷 / 18期

关键词：

D O I：

10.1063/1.1571983

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The surface structure of an anatase Ti0.94Co0.06O2 (001) film, grown epitaxially on a Nb-doped SrTiO3 (001) substrate, was investigated using in situ scanning tunneling microscopy. For the as-grown film, a (1xn) (n=3, 4, 5, and 6) reconstructed surface was observed that shows (n-2) faint rows between adjacent bright rows. After annealing at 650 degreesC, nanoparticles appeared, mostly on the step edges. From the I-V curves measured by scanning tunneling spectroscopy, the tunneling gap of Co:TiO2 was estimated to be about 3.0 eV, consistent with the band gap (E-g=3.2 eV) of pure anatase TiO2. However, on nanoparticles, the I-V curve showed a much smaller gap, suggesting that the particle must be different from TiO2. (C) 2003 American Institute of Physics.

引用

页码：3080 / 3082

页数：3

共 12 条

[1]

Chambers S. A., UNPUB

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